But here comes Congress to the rescue with the "Preventing Harassment through Outbound Number Enforcement (PHONE) Act of 2007." The bill has passed the house and come out of committee in the Senate and is awaiting a vote by that body.

The PHONE act would not ban all spoofing, just that done with the intent to defraud or impersonate another without their consent. This would seem to excuse, for example, large corporations that call from India but use their main US phone number for the caller ID. There is also an exception for law enforcement.